Mackintosh, R. S. and Keeley, N.
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|DOI (Digital Object Identifier) Link:||http://doi.org/10.1103/PhysRevC.85.064603|
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Recent studies showed that neutron pickup makes a substantial contribution to the proton optical model potential (OMP) for light, mostly halo, target nuclei. Here, we extend those studies to a more “normal” target nucleus: 40Ca. We present coupled reaction channel (CRC) calculations with the coupling of 30.3 MeV incident protons to deuterons and up to 12 states of 39Ca. The proton elastic scattering S matrix from the CRC calculation is subject to Slj→V(r)+l·s VSO(r) inversion and the bare potential of the CRC calculation is subtracted, directly yielding a local and L-independent representation of the dynamic polarization potential (DPP). This is appropriate for comparison with phenomenological OMPs and local OMPs derived in local density folding models. The real-central part of the DPP is repulsive and cannot be represented as a uniform normalization of the bare potential, changing the rms radius. A series of model calculations reveal the dependence of the DPP on a range of parameters illuminating (i) departures of nucleon potentials of specific nuclei from global properties, (ii) the generation of repulsion, and (iii) the requirements for all-order CRC and deuteron breakup. Light is thrown on the nonlocality of the underlying DPP.
|Item Type:||Journal Article|
|Copyright Holders:||2012 American Physical Society|
|Extra Information:||11 p.|
|Academic Unit/Department:||Science > Physical Sciences
|Depositing User:||Raymond Mackintosh|
|Date Deposited:||31 Aug 2012 09:56|
|Last Modified:||23 Feb 2016 21:00|
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